Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab7abe2fdc9832d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 21:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a04b0b6b9fb2310cb4d5cb9226f15fc8 SHA-1: 10944a70e8bac24c0ebe086013940e83a8d5af46 SHA-256: fab7abe2fdc9832d049d3b573c2721f746a3598f57cc27202cb4fa69bf1c17ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use redirector patterns. Heuristics indicate these are link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=we+bless+your+name+almighty+god+lyrics PDF link annotation
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092cd9810bc4---sinawusumumusuvojupaze.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/opi006fd8g0qjpug0agr1hdihs/jowexufogow.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608413bb09808---85951351446.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baacecc0e75---20000675963.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/50694111013.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/84929817065.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/velivokikodegetozixajovop.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/27681684128.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4bdf2edb---79635359752.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/70686518205.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/xesita.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rujozadakejotewejig.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a33985e8a---21705655803.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ecf89eea4---7895633156.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/losorav.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/lutaliwazepudefirexixiz.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/80532633681.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/25ef7b19643126ad8fb3b7a3c2c4bdae/vonijovazeganuzenezefoma.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a194fb21800cf9176be4011bfa584847/85715605309.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6dfd11f7964676c9dd58b2db3aa335e7/nonotikajexomexiluxe.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/16449940318.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/21699176009.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/17638942406.pdfIn PDF document text
    • https://bauarch.bg/files/vakuzuselerivu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 18344 bytes
SHA-256: 7d937a15a484d142fdbdaab562cbfba3fff8502e7c2f05c7380fe60ccf8b1e2a
font_02_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 11164 bytes
SHA-256: 30f20054c572f7dd482b230a5f2ac31024ab1886d5e22665197954280ef3b29f

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